var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var session = require('express-session');
var MongoStore = require('connect-mongo')(session);
var multer = require('multer');
var flash = require('connect-flash');
var fs = require('fs');

var routes = require('./routes/index');
var settings = require('./settings');

var accessLog = fs.createWriteStream('access.log', {flags: 'a'});
var errorLog = fs.createWriteStream('error.log', {flags: 'a'});

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(flash());
// uncomment after placing your favicon in /public
app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
// app.use(logger('dev'));
app.use(logger('combined',{stream: accessLog}));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use(function (err, req, res, next) {
    var meta = '[' + new Date() + ']' + req.url + '\n';
    errorLog.write(meta + err.stack + '\n');
    next();
});

app.use(session({
    secret: settings.cookieSecret,
    key: settings.db,
    cookie: {maxAge: 1000 * 60 * 60 * 24}, //1 day
    resave: true,
    saveUninitialized: true,
    store: new MongoStore({
        url: settings.url
    })
}));

//上传图片
app.use(multer({
    dest: './public/images',
    rename: function (fieldname, filename) {
        return filename;
    }
}));

routes(app);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
